I did some more testing with this and noticed that I was somewhat incorrect in my earlier statement. The option was not removed from the Engine in version 4.3. Instead, it was changed so it was only visible in projects with a Visual Studio solution (code-based projects, or Blueprint projects that have had code added to them). I had previously been testing in pure Blueprint projects where the option is no longer visible.
In regards to correct functionality, every time I tested it, Visual Studio opened the header file where the node is declared. Is this not happening for you?